Energy accumulator unit

Abstract

The invention relates to an energy storage unit for a hydrostatic-mechanical drive system ( 1 ). The energy storage unit ( 31 ) comprises at least one hydrostatic machine ( 33 ) which can be connected to the drive system ( 1 ) via a mechanical interface ( 35 ). Furthermore, the energy storage unit ( 31 ) comprises a storage element ( 32 ) which is connected to a hydrostatic machine ( 33 ) via a storage line ( 36 ). The storage line ( 36 ) can be connected to a hydraulic interface ( 38 ), and the hydraulic interface ( 38 ) is provided for the purpose of connecting the energy storage unit ( 1 ) to the drive system ( 1 ).

1 . Energy accumulator unit for a hydrostatic-mechanical drive system, the energy accumulator unit having at least one hydrostatic machine, which can be connected to a drive system via a mechanical interface, an accumulator element, which is connected to the hydrostatic machine via an accumulator line, and a hydraulic interface, which can be connected to the accumulator line and serves to connect the energy accumulator unit to the drive system. 
   
   
       2 . Energy accumulator unit according to  claim 1 ,
 wherein the energy accumulator unit comprises a control unit for controlling an energy flow via the mechanical interface and/or the hydraulic interface, it being possible for the control unit to be connected to the drive system via a control interface.   
   
   
       3 . Energy accumulator unit according to  claim 1 ,
 wherein the hydraulic interface can be connected to the accumulator line via an interface line and a controllable valve is arranged in the interface line.   
   
   
       4 . Energy accumulator unit according to  claim 3 ,
 wherein the controllable valve can be controlled by the control unit.   
   
   
       5 . Energy accumulator unit according to  claim 3 ,
 wherein a pressure sensor is arranged in the energy accumulator unit on both sides of the controllable valve.   
   
   
       6 . Energy accumulator unit according to,
   claim 1 , wherein the hydrostatic machine is provided for two flow directions and is adjustable in its delivery or absorbing volume.   
   
   
       7 . Energy accumulator unit according to  claim 6 ,
 wherein the hydrostatic machine can be controlled by the control unit in order to set its flow direction and its delivery or absorbing volume.   
   
   
       8 . Energy accumulator unit according to,
   claim 1 , wherein a shut-off valve is arranged between a connecting point of the accumulator line, to the interface line, and the accumulator element.